NASA Working Group Establishes VTE Risk Score Algorithm for Astronauts to Mitigate Spaceflight Thromboembolism

Summary

NASA's Office of the Chief Health and Medical Officer initiated a working group in April 2026 to review VTE case information and discuss research progress to mitigate the risk of Venous Thromboembolism during spaceflight. The group developed a VTE Risk Score for Astronauts Algorithm, recommending anticoagulation prophylaxis for stasis alone or a combination of other thrombosis risk factors.